Nut-lock



(No Model.)

T. W. PATTEN.

NUT LOOK.

No. 398,535. Patented Feb.26, 1889.

% INVENTOR:

BY M f g ATTORNEYS.

A WITNESSES:

THOMAS XV. PATTEN, OF BATIIIMORE, MARYLAND.

N U T L O C K.

SPECIFICATION forming part of Letters Fatent No. 398,535, dated February26, 1889.

Application filed October 17, 1888. Serial No. 288,341. (No model.)

To aZZ- whom it may concern.-

Be it known that I, THOMAS W. PATTEN, of Baltimore city, in the State ofl\i[aryland,have invented a new and useful Improvement in Nut-Locks ofwhich the following is a specification.

My invention is in the nature of an improved nut-lock, designedespecially for securing the fish-plates of railroad-rails, but

applicable also to other uses; and it consistsv nut and boss of thewasher, as hereinafter 5 fully described.

Figure 1 is a longitudinal section through the bolt and nut; Fig. 2, atransverse section through line at :r of Fig. 1. Fig. 3 is an insideface view of the nut, and Fig. 4- is a view of the adjacent face of thewasher.

A represents an ordinary bolt having a screw-threaded stem, and B is thefish-plate or other bearing against which the nut is to be screwed. Cthe washer, and D the nut. The washer C occupies a position between thenut and the fish-plate, and has on one side of its central hole aneccentric boss, I), and has formed on its inner periphery tral'isverseteeth or notches (1, extending from the thinnest to the thickest part ofthe boss about half-way around the hole, these teeth being formedlongitudinal to the bolt or at right The nutDhas f angles to the threadsthereof.

the usual screw-threaded hole adapted to lit upon and turn on thescrew-threads of the 3 bolt. but has its face which adjoins thej sion,c. in its side. and the washer C, having washer recessed ccccntricallyat c to receive the boss 1 of the washer. The outer circum- :t'erenc olthis recess is also toothed or serrated at d to engage with the outersurface of i the boss on the washer.

and turned up upon the threads of the same until it touches the boss ofthe washer, and as the latter is received in the eccentric recess of thenut the nut and washer both turn together until the washer begins tobind against the fislrplate or other bearing. As soon as this bindingtakes place, the washer being somewhat retarded in its revolution, aslight motion takes place between the eccentric surface of the boss onthe washer and the recess in the nut, which causes the washer to bejammed with a cam action against the bolt, burying the teeth of thewasher transversely into the threads of the bolt and looking the partsfirmly together. The function of the set of teeth or serrations (Z onthe nut is to engage with the outer surface of the boss on the washerand prevent any back motion of the nut.

I am aware that it is not new to recess one side of a nut with aneccentric depression and to place therein a smaller nut with aneccentric periphery to produce a cramping cam action, and I do not claimthis arrangement.

llavingthns described my invention.whatl claim as new is- 1. A nut-lockconsisting of a screwdhreaded nut having an eccentric depression in oneside, combined with a washer havin an eccen tric boss projectinglaterally therefrom and having on its inner periphery transverse teethadapted to engage transversely the threads of a bolt, substantially asdescribed.

2. A nutloek consisting of a screw-threaded n-ut having an eccentricdepression in its side with teeth (I, combined with the washer having aneccentric boss on its side and transverse teeth u on its inner surface,substantially as and for the purpose described.

3. The combimuion, with the bolt, of the nut I), having an eccentricrecess or depresan eccentric boss, b, on its side adapted to enter therecess of the nut. and having teeth or serrations on its inner peripheryarranged f transversely to the threads of the bolt, sub- The washer andboss may be made of malf leable cast-iron, and the nut is hotn'essed tostani iall v as and for the purpose described.

THOMAS XV. PATTEN.

\Vitnesses:

SoLoN C. KEMON, J. MIDDLETON.

